Date: Mon, 11 Dec 2000 23:44:30 +1100 From: "Jeff Fulton" <jefff@fulton.net.au> To: "Roman Shterenzon" <roman@xpert.com>, "David Erickson" <erickson@mddsg.com> Cc: <freebsd-security@FreeBSD.ORG> Subject: Re: MAC Address Message-ID: <020401c06370$1ca77f40$2001a8c0@amoeba> References: <Pine.LNX.4.30.0012110914240.12823-100000@jamus.xpert.com>
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The switch learns your location when it processes a packet sent by you. Once you're in the station cache, you'll get timed out if you don't send anything for a minute or two. If a rogue duplicate sends something, the station cache will be modified to point to him. Of course, it may change straight back if the real owner transmits something again. I don't think both the rogue and the duplicate can be in the station cache at the same time. Regards, jeff Fulton ----- Original Message ----- From: "Roman Shterenzon" <roman@xpert.com> To: "David Erickson" <erickson@mddsg.com> Cc: <freebsd-security@FreeBSD.ORG> Sent: Monday, December 11, 2000 6:16 PM Subject: Re: MAC Address > On Mon, 11 Dec 2000, David Erickson wrote: > > > > Sounds to me all this is just_slightly_unethical_if > > > _not_bordering_on_illegal. This is a topic for a security mailing list? > > > I thought we were here to boost network security, not circumvent it. > > > Just a network technician's opinion. > > > > How is it unethical to change ones MAC address? First of all a MAC address > > is only used on your local LAN segment. MAC Addresses do not traverse over > > IP. Once your traffic hits a router the traffic is then relayed. ARP is > > The most interesting question is if I know some mac address on a switched > network and then I set my mac address to this address, if some switches > _will_ deliver packets to me as well? It might be interesting sniffing > strategy on a switched network if some switches work this way. > Thoughts? > > --Roman Shterenzon, UNIX System Administrator and Consultant > [ Xpert UNIX Systems Ltd., Herzlia, Israel. Tel: +972-9-9522361 ] > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-security" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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